Dangerous sea creatures great and small

First, the large:

Six men are lucky to be alive after a whale threw their boat metres into the air in the Whitsundays.

The group was returning from a reef fishing trip on Saturday afternoon, when the large humpback breached underneath the 8.5-metre aluminium vessel, near Gloucester Island.
The impact of the collision with the whale and the water was so great that those on board were violently thrown around the boat, with two men knocked unconscious.

And then, the small - the Melbourne sea lice attack.   That really is a surprising story, but apparently sea lice can be particularly ferocious down there.   There will be few toddlers allowed to play in the water near Melbourne for a while, I imagine.